Datenblatt-pdf.com


QHX220 Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer QHX220
Beschreibung Active Isolation Enhancer and Interference Canceller
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 19 Seiten
QHX220 Datasheet, Funktion
Active Isolation Enhancer and Interference Canceller
QHx220
Features
Electromagnetic Interference (EMI) is emerging as a
major concern in next generation wireless
communication systems. As wireless terminals now
support multiple services and features that utilize high
data rates simultaneously, removing interference within
wireless terminals like handsets has become a challenge.
Reducing the Electromagnetic Interference recovers
the receiver sensitivity, enabling simultaneous
operation of multiple radios, and improves the overall
quality of service of communication devices. Intersil’s
QHx220 is situated in a handset to sample the source
of the noise and emulate the RF coupling channel
between the noise source and victim receiver antenna.
In doing so, an anti-noise signal can be applied directly
to the victim receive path to cancel the EMI and
achieve the signal integrity benefits. This approach
makes it possible to cancel both in-band (within the
victim Rx band) or out-of-band aggressors. This is a
revolutionary approach since it is only possible to
cancel out of band noise using conventional Rx filters.
In addition QHx220 may be used to increase the
inherent isolation between antennas or inside duplexers
and switches, thus allowing to increase the transmit
power in repeaters or yielding higher sensitivity in the
receivers. Both measures finally resulting in a better
coverage, larger cell size, smaller antennas or lower
power of infrastructure components such as
basestations, pico-and Femtocells as well as repeaters.
The QHx220 integrates the sampler path LNA gain stages
as well as the DACs required to control the I and Q
control voltages (used to set the magnitude and phase of
www.tDhaetacSahneecte4lUla.ctioomn signal). Both the gain, and control
voltages are programmable using a SPI bus interface.
• Protocol agnostic. Designed for: GSM, CDMA, DVB-H,
ISDB-T, DMB
• Frequency Range 300MHz to 3GHz
• Integrated, programmable LNA gain stages in the
sampler path
• SPI bus controlled integrated DACs
• >20dB Noise Cancellation is possible
• 50dB typical Dynamic Range
• Low Power Consumption (<20mW typical, ~2µW
standby)
• Ultra Small ~ 1mm2 devices are available as tested
bumped die or 3x3mm2 QFN package
Applications
• Most any wireless device with a local aggressor:
- Cell phones
- Mobile TV devices
- Laptop Computers
- GPS terminals
- Pico- and Femtocells
• Improved Tx to Rx Isolation of devices (i.e. duplexer,
switches) or between neighboring antennae
• Basestations
• Linearization of PAs
Typical Application Circuit
Benefits
• Actively cancels unwanted local RF noise
• Improves BER, receiver sensitivity, C/N by canceling
noise generated from local aggressors
• Improves isolation between adjacent antennas
• Can be used to cancel in-band or out-of-band
interferers (i.e. spurs, harmonics, phase noise, or
other noise sources like IM products generated in a
PA)
• Enables simultaneous operation of multiple
co-located radios
• Improves overall quality of service
FIGURE 1. ACTIVE ISOLATION ENHANCER AND NOISE
CANCELLER
October 20, 2009
FN6986.0
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.






QHX220 Datasheet, Funktion
Power ON/OFF Sequence
Power ON
Slope1: >1.8V/50ms
VDDA & VDDA2
0V
Power ON
1.8V
t1>0
ENBAR
Low
t2>250µs
BUS ENABLE
Low
QHx220
CLK
Low
DATA
Low
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
MSB
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LSB
0
I-DAC
(10 bits: 0111111111)
Q-DAC
(10 bits: 0111111111)
(This command sets QHx220 into minimum gain (Note 8))
Freq. Range Gain Spare
(MTV: 00) (0) (0)
Power OFF
1.8V
VDDA & VDDA2
Power OFF
Slope2: >1.8V/50ms
0V
ENBAR
Low
BUS ENABLE
Low
www.DataSheet4U.com
CLK
Low
DATA
Low
NOTES:
8. When the chip is powered up its register are all zero. This means -135° phase and full analog gain, WLAN Application and 0dB
coarse gain (the boost gain mode is not enabled).
9. VDDA and VDDA2 should be connected on the PCB and decoupled with caps right next to the pin.
10. The SPI Bus is not accessible when VDDA/VDDA2 are <1V.
6 FN6986.0
October 20, 2009

6 Page









QHX220 pdf, datenblatt
QHx220
Typical Performance Characteristics (L-Band) (Continued)
Plots are exemplary only, to show typical performance and provide a frame of reference. Typical test conditions (TTC)
VDD = 1.8V, TA = +25°C, and PIN < -48dBm, unless otherwise noted. Extreme Characterization Conditions (ECC) are
VDD = 1.7V to 1.9V, TA = -40°C to +85°C.
FIGURE 15. GAIN vs FREQUENCY AT LOW, MID, HIGH,
AND BOOST GAIN SET POINTS
GAIN VS TEMPERATURE AT 1575MHZ
Vctrl_a = Vctrl_b = 0V
14
HG VDD = 1.9V
12
10 HG VDD = 1.7V
8
HG VDD = 1.8V
6
4
LG VDD = 1.8V
2
LG VDD = 1.9V
0
-2
-40
LG VDD = 1.7V
-5 25
55
85
TEMPERATURE (°C)
FIGURE 16. GAIN VARIATION UNDER ECC MEASURED
AT 1575MHz AT LOW GAIN AND HIGH GAIN
SET-POINTS
230
PHASE vs TEMPERATURE AT 1575MHz
Vctrl_a = Vctrl_b = 0V
LG VDD = 1.8V
225
220
LG VDD = 1.7V
www.DataSheet4U.com
215
LG VDD = 1.9V
HG VDD = 1.7V
HG VDD = 1.9V
210
HG VDD = 1.8V
205
-40 -5 25 55 85
TEMPERATURE (°C)
FIGURE 17. PHASE VARIATION UNDER ECC MEASURED
AT 1575MHz AT LOW GAIN AND HIGH GAIN
SET-POINTS
IIP3 vs TEMPERATURE AT 1575MHz
Vctrl_a = Vctrl_b = 0V
-26
-28 HG VDD = 1.7V
LG VDD = 1.7V
-30
LG VDD = 1.8V
-32
LG VDD = 1.9V
-34 HG VDD = 1.8V
HG VDD = 1.9V
-36
-38
-40
-40 -5 25 55 85
TEMPERATURE (°C)
FIGURE 18. IIP3 VARIATION UNDER ECC MEASURED
AT 1575MHz AT LOW GAIN AND HIGH GAIN
SET-POINTS
12 FN6986.0
October 20, 2009

12 Page





SeitenGesamt 19 Seiten
PDF Download[ QHX220 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
QHX220Active Isolation Enhancer and Interference CancellerIntersil Corporation
Intersil Corporation

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche